<!DOCTYPE html>
<html lang="zh_CN">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width,initial-scale=1.0">
  <title>Title</title>
  <style>
    div[class^="icon"][class*="31"][class$="mock"]{
      color: red;
    }
  </style>
</head>
<body>
<div class="icon-github32-mock1">123</div>
<div class="icon-github31-mock">123</div>
<div class="icon-github30-mock">123</div>
</body>
</html>
